On average the like and share buttons are viewed across almost 10 million websites daily. More shares occur if there is no like button. Including a share button in email newsletters leads to more click throughs.
Basically, it is a great way of getting your customers and website visitors to market you and your services to all their friends and colleagues for free, and instantly for just a few minutes work. Remember this will work in different ways for all sharing on social media, not just Facebook.
It is really easy to add one. Just go to My Websites > Customise Design > Site Footer. CLick the "Image" button, then "Choose from Library". Scroll to the section titled: Click on any placeholder for a Your-Domain-Only widget". Here click the "AddThis" Share icon. OK and Save your changes.
If you have old data cached in your share information you can force Facebook to reindex your social sharing information or "fetching a new scrape" as Facebook calls it from here: https://developers.facebook.com/tools/debug/og/object/. We found you need to run the process a few times for the update to be made.
Apparently the amount of shares shown on the share button does not show the true sharing picture, as it does not include shares of shares, or copy and paste of URL. If you really want a more detailed picture, edit the below code to your own URL and paste it into your browser address bar: